import numpy as np
arr2d = np.array([[1,6,11,16,21],
                  [2,7,12,17,22],
                  [3,8,13,18,23],
                  [4,9,14,19,24],
                  [5,10,15,20,25]])
print(arr2d[2])
print(arr2d[:2,:2])
print(arr2d[:,2])
print(arr2d[2,1])

import numpy as np
arr_one = np.array([[1,2,3],[4,5,6],[7,8,9]])
arr_two = np.array([[2,3,4],[5,6,7],[8,9,10]])
print(arr_one + arr_two)
print(arr_one - arr_two)
print(arr_one * arr_two)

import numpy as np
arr_2d = np.array([[1,2,3],[4,5,6]])
data = 10
print(arr_2d+data)